Convert/coerce to CIELUV matrix

pth_to_cieluv(color, whitepoint = whitepoints_cie1931("D65"))

pth_new_cieluv(mat, whitepoint = whitepoints_cie1931("D65"))

Arguments

color: character or matrix with S3 class pth_mat, a representation of a color.
whitepoint: double array with one dimension, length three; describes the whitepoint reference for the color space.
mat: double matrix with three columns, one row for each color.

Value

double

matrix with S3 classes pth_cieluv and pth_mat, with three columns, one row for each color.

Examples

  pth_to_cieluv("#663399")
#>            L*       u*       v*
#> [1,] 32.90247 12.98289 -67.7538
#> attr(,"class")
#> [1] "pth_cieluv" "pth_mat"   
#> attr(,"whitepoint")
#> [1]  95.047 100.000 108.883
  pth_new_cieluv(matrix(c(32.9, 13.0, -67.8), ncol = 3))
#>        L* u*    v*
#> [1,] 32.9 13 -67.8
#> attr(,"class")
#> [1] "pth_cieluv" "pth_mat"   
#> attr(,"whitepoint")
#> [1]  95.047 100.000 108.883